Add basic index page

index.md

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+# nikdoof's Helm Charts
+
+## Usage
+
+[Helm](https://helm.sh) must be installed to use the charts.
+Please refer to Helm's [documentation](https://helm.sh/docs/) to get started.
+
+Once Helm is set up properly, add the repo as follows:
+
+```console
+helm repo add nikdoof https://nikdoof.github.io/helm-charts/
+```
+
+You can then run `helm search nikdoof` to see the charts.